<template>
  <div>
    <table
      border="1"
      width="700"
      style="border-collapse: collapse ;"
    >
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model='falg'/> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr> 
      </thead>
      <tbody>
        <shopping v-for="(item,index) in goodList" :key="index"
        :name="item.name"
        :price="item.price"
        :num="item.num"
        :index="index"
        :item="item"
        :checked="item.checked"
        @getBtn1="fn1"
        @getBtn2="fn2"
        @getBtn3="fn3"
        ></shopping>
      </tbody>
      <tfoot>
        <!-- <tr>
          <td>合计:</td>
          <td colspan="5">
          {{sumList}}
          </td>
      </tr> -->
      <shoppingAll :goodList="goodList"></shoppingAll>
      </tfoot>
    </table>
  </div>
</template>

<script>
   import shopping from './第三天作业/购物车作业/shopping.vue'
   import shoppingAll from './第三天作业/购物车作业/shoppingAll.vue'
export default {
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  components:{
    shopping,
    shoppingAll
  },
  methods:{
    fn1(index){
     this.goodList[index].num-- 
    },
    fn2(index){
      this.goodList[index].num++ 
    },
    fn3(index){
      this.goodList.splice(index, 1) 
    },
  },
  computed:{
    falg:{
       set(checked){
         this.goodList.forEach(item =>item.checked = checked) 
       },
       get(){
           return this.goodList.every(item =>item.checked === true)
       }
    }
  }
};
</script>

<style>
</style>